CN103423666A - Light fixture - Google Patents
Light fixture Download PDFInfo
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- CN103423666A CN103423666A CN2013101236572A CN201310123657A CN103423666A CN 103423666 A CN103423666 A CN 103423666A CN 2013101236572 A CN2013101236572 A CN 2013101236572A CN 201310123657 A CN201310123657 A CN 201310123657A CN 103423666 A CN103423666 A CN 103423666A
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- light fixture
- light
- chamber portion
- radiator
- fixture according
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
- F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
- F21S8/06—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
- F21V23/009—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being inside the housing of the lighting device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0008—Reflectors for light sources providing for indirect lighting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/02—Wall, ceiling, or floor bases; Fixing pendants or arms to the bases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/12—Flameproof or explosion-proof arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Abstract
A light fixture comprising a chamber portion is disclosed. In some embodiments, the fixture comprises a chamber portion shaped to house circuitry required for lighting elements such as light emitting diodes (LEDs) mounted elsewhere in the fixture. In some embodiments, LEDs are mounted facing a back reflector, which in turn reflects light out of a troffer to form an indirect lighting fixture. In some embodiments, light is emitted from one mixing chamber. In some embodiments, light is emitted from two or more mixing chambers. In some embodiments, LEDs are mounted on a heat sink which cooperates with a chamber portion.
Description
Related application
The application requires the U.S. Provisional Application No.61/622 submitted on April 10th, 2012,482 rights and interests, and require the U.S. Provisional Application No.61/705 submitted on September 25th, 2012, and 585 rights and interests, above-mentioned two applications are incorporated into this by quoting as proof by their whole contents.
Technical field
The troffer (troffer, troffer) that the present invention relates to throw light on, and more specifically, relate to and be very suitable for the indirect lighting troffer used together with solid-state illumination light source (such as light emitting diode (LED)).
Background technology
Generally use the light fixture of troffer type in global commercial office and industrial space.In many examples, these troffers hold the elongated fluorescent illumination bulb of the length of crossing over troffer.Troffer may be mounted to ceiling or hang from ceiling.Usually, troffer may be recessed in ceiling, and wherein the dorsal part of troffer is given prominence in the aerated area that enters the ceiling top.Typically, troffer be positioned at dissipation of heat that the element on dorsal part will produce from light source to aerated area, at the aerated area Air, can circulate so that cooling body.The United States Patent (USP) 6,210,025 of authorizing the people's such as Bell U.S. Patent No. 5,823,663 and authorizing the people such as Schmidt is all examples of the light fixture of typical troffer type.
Recently, along with the appearance of effective solid-state illumination light source, these troffers are used with together with light emitting diode for example.Light emitting diode is such solid-state device: they can convert electrical energy into light and generally include one or more active region of the semi-conducting material between the semiconductor layer of phase contra-doping.When being applied on doped layer by bias voltage, hole and electronics are injected in active region, and in active region, they are again in conjunction with to produce light.Produce light and from the surface emitting light of light emitting diode in active region.
Light emitting diode has some specific features, and these features make them ideally for many application that before belonged to incandescent lamp or field of fluorescent lamps.Incandescent lamp is the low-down light source of efficiency, the electric power that wherein their consume 90 percent be roughly to be released as heat, but not light.Fluorescent lamp bulb is than more effectively about 10 coefficients of incandescent lamp bulb energy, but still is that relative efficiency is low.Compare, light emitting diode can utilize the fraction energy and launch the luminous flux identical with incandescent lamp and fluorescent lamp.
In addition, light emitting diode can have quite long working life.Incandescent lamp bulb has the relatively short life-span, and some incandescent lamp bulbs have the life-span in about 750-1000 hour scope.Fluorescent lamp bulb also can have the life-span longer than incandescent lamp bulb, such as in life-span of scope of 10000-20000 hour roughly, but is to provide less-than-ideal color reproduction.Compare, light emitting diode can have the life-span between 50000 and 70000 hours.The efficiency of the increase of light emitting diode and the life-span of prolongation are attractive for some illumination suppliers, and cause their LED light lamp to be employed and be substituted in the traditional lighting in the different application occasion.Can foretell, further improvement will cause that it generally is accepted in more illuminations application scenario.The increase that replaces the employing of incandescent lighting and fluorescent illumination will cause improving illumination efficiency and significantly save the energy.
Developed other light emitting diode parts or lamps, these light emitting diode parts or lamp comprise the array of a plurality of LED package that are mounted to printed circuit board (PCB) (PCB), substrate or sub-base.The array of LED package can comprise the group of the LED package of launching different colours, and mirror or other reflector systems with reflection the light by the light-emitting diode chip for backlight unit emission.Some in these light emitting diode parts are arranged to produce the white light by the light combination of different light-emitting diode chip for backlight unit emissions.
In order to produce the output color of expectation, some the time need to will utilize the color of the light that easily produces of general semiconductor system mixed.Interested especially, produce white light to use for the application scenario of throwing light on every day.The tradition light emitting diode can not produce white light from their active layer, and it must be from other color combination to produce white light.For example,, by with yellow phosphorus, polymer or dyestuff, around blue LED, utilizing blue LED to produce white light, wherein typical phosphorus is cerium doped yttrium aluminum garnet (Ce:YAG).Around phosphate material some blue lights of " changing downconverts downwards ", it is changed into to gold-tinted.Some blue lights do not change through phosphorus, and the major part of light is converted to yellow downwards.Light emitting diode emission blue light and gold-tinted, blue light and gold-tinted are in conjunction with producing white light.
At another, in known method, by making polychrome phosphorus or dyestuff around light emitting diode, the purple that will launch from light emitting diode or ultraviolet look are converted to white light.In fact, some other color combination have been applied to producing white light.
Due to the physical layout mode of each provenance element, the polychrome source usually projects with the shade of color separation and the output with poor color homogeneity is provided.For example, when watching from the head, the source of blue feature and yellow source seem to have blue color, but while watching from the side, have yellow colors.Therefore, the challenge be associated with polychromatic source is that spatial color good on whole viewing angle zone mixes.A kind of is to utilize diffusing globe by the light scattering from various sources for the known method that solves the blend of colors problem.
Another known method for improvement of blend of colors be by light at it from emission before lamp emission or launch out several surfaces.This has the effect from its original transmission angular separation by the light of emission.Homogenising typically utilizes the amount of launching of raising to improve, but each launches and has relevant optical loss.In the middle of using in some application, diffusion mechanism (for example, forming the lens of diffuser and veining) mixes with the different colours by light.Some in these devices are lossy, therefore, in the situation that sacrifice the uniformity that the optical efficiency of device improves color.
Many present Design of Luminaires are utilized the light emitting diode parts of face forward, the back of the light emitting diode wherein the mirror emitter is placed on.A light mixing that the design challenge be associated with the multi-source light fixture is the diode source of self-luminous in the future in light fixture, thus each source is sightless for observer.Also with heavy diffused component, mix the chromatic spectrum from each provenance, to realize exporting the uniformly halo exterior feature.For mixing source and help blend of colors, used heavy diffusion to exit window.Yet the propagation of the diffusion material by such weight causes significant optical loss.
Some existing designs have been combined with the indirect lighting scheme, and in this scheme, light emitting diode or other source purposes are a direction outside the target transmit direction.This may interact by encouraging light and inner member (such as diffuser).Can find an example of indirect light fixture in the U.S. Patent No. 7,722,220 of authorizing Van de Ven, this patent and the application transfer the possession of jointly.Many dissimilar indirect light fixtures with design are possible.
Modern illumination application requires High Power LED usually in order to improve brightness.High Power LED can cause large electric current, must control the significant heat produced.Some systems are utilized radiator, radiator must with the good thermo-contact of light source that produces heat.The light fixture of troffer type is usually from the dorsal part distribute heat that extends into airspace of light fixture.Can avoid like this as reduced the challenge of airspace in modern structure.In addition, the temperature in aerated area, usually than the high several years of the indoor temperature below ceiling, more is difficult to by dissipation of heat to ventilated environment it.
Summary of the invention
An embodiment of light fixture comprises the housing that is shaped as the restriction inner surface and is positioned at the back reflector on inner surface.This light fixture has: radiator, and this radiator is near the length of back reflector and leap housing; And chamber portion, this chamber portion limits and is shaped as the inner space that holds electric component.Chamber portion coordinates with radiator.
Another embodiment of light fixture has the housing that is shaped as two or more inner surfaces of restriction, wherein on each inner surface, has back reflector.This light fixture has radiator, and this radiator is near the length of back reflector and leap housing.Chamber portion limits and is shaped as the inner space that holds electric component.This chamber portion coordinates with radiator
Another embodiment of light fixture comprises the housing that has certain-length and limit interior space, in interior space, has back reflector.Radiator extends to the second end of housing and is close to back reflector from the first end of housing.A plurality of light sources are positioned on radiator and towards back reflector.This light fixture has the chamber portion between the first end of housing and the second end.
The accompanying drawing explanation
The face upwarding stereogram that Figure 1A-1E is light fixture according to an embodiment of the invention, overlook exploded perspective view, top view, side view and end-view.
The top view that Fig. 2 is installation bracket according to an embodiment of the invention.
The amplification sectional block diagram of the part of analysing and observe view and light fixture according to an embodiment of the invention that Fig. 3 A and Fig. 3 B are light fixture according to an embodiment of the invention.
The amplification sectional block diagram of the part that Fig. 4 A and Fig. 4 B are light fixture according to an embodiment of the invention.
Fig. 5 is the stereogram that is installed on the light fixture according to an embodiment of the invention of ceiling.
Fig. 6 is the stereogram that is suspended on the light fixture according to an embodiment of the invention of ceiling below.
The face upwarding stereogram that Fig. 7 A-7E is light fixture according to an embodiment of the invention, overlook exploded perspective view, top view, side view and end-view.
Fig. 8 is the stereogram that is installed on the light fixture according to an embodiment of the invention of ceiling.
The face upwarding stereogram that Fig. 9 A-9G is light fixture according to an embodiment of the invention, top perspective view, upward view, top view, side view, end-view and top perspective exploded view.
The face upwarding stereogram that Figure 10 is light fixture according to an embodiment of the invention.
The three-dimensional transverse sectional view that Figure 11 is light fixture according to an embodiment of the invention and three-dimensional longitudinal sectional view.
The three-dimensional longitudinal sectional view that Figure 12 is light fixture according to an embodiment of the invention.
Figure 13 is the stereogram that is installed on the light fixture according to an embodiment of the invention of ceiling.
The specific embodiment
Embodiments of the invention provide a kind of troffer type light fixture used together with solid state lamp source (such as LED) that is suitable for especially rightly.This troffer is included on its circumference and is reflected the photo engine unit that dish surrounds.Back reflector limits the reflecting surface of photo engine.In order to be conducive to unwanted heat energy, away from light source, dissipate, next-door neighbour's back reflector arranges radiator.In certain embodiments, one or more lens boards are from radiator extends to back reflector.The part of radiator is exposed to the outer surrounding environment of cavity.The part that is positioned at back reflector inside of radiator, with the installation surface that acts on light source, forms the available heat path from light source to surrounding environment.Along radiator, one or more light sources that surface arranges are installed light is transmitted in inside, at light, as before using up and penetrating from troffer, luminous energy mixes and/or is shaped in inside.Luminous troffer is known as indirect troffer or light fixture (being used interchangeably in this article) by this way.Some indirect light fixtures are at the U.S. Patent application No.12/873 that belongs to being entitled as of the people such as Edmond " Troffer-Style Fixture(troffer type light fixture) ", in 303, described, it transfers the applicant in normal way, and its integral body is incorporated into to this fully by quoting as proof.
It is relative strong due to LED light source, with other light sources, comparing, if therefore suitably do not scatter, they can form uncomfortable working environment.Use the fluorescent lamp of T8 bulb typically to there is the 21lm/in of being approximately
2Surface brightness.Many high output LED light fixtures have the 21lm/in of being approximately at present
2Surface brightness.Some embodiments of the present invention are designed to provide and are not more than about 32lm/in
2Surface brightness.Other embodiment are designed to provide and are not more than about 21lm/in
2Surface brightness.Other embodiment in addition are designed to provide and are not more than about 12lm/in
2Surface brightness.
Embodiments of the invention are designed to effectively produce the visually output of pleasant.It is luminous that some embodiment are designed to be not less than the usefulness of about 65lm/W.Other embodiment are designed to have the luminous efficacy that is not less than about 76lm/W.Other embodiment in addition are designed to have the luminous efficacy that is not less than about 90lm/W.
An embodiment of light fixture is designed to be not more than the high-high brightness gradient of 5:1 to be not more than 32lm/in
2Maximized surface brightness realize being at least total optical efficiency of 88%.Total optical efficiency is restricted to the percentage that in fact light that sends from light source send from light fixture.Other similar embodiment are designed to realize being not more than 24lm/in
2Maximized surface brightness.Other similar embodiment in addition are designed to realize being not more than the high-high brightness gradient of 3:1.
An embodiment of light fixture comprises chamber portion, and this chamber portion can hold for example circuit and be connected with electric wire.This chamber portion can be arranged on the centre of light fixture and match with radiator.By chamber portion being arranged on to the centre of light fixture, can use less lens to reduce costs.
An embodiment of light fixture comprises thin-long casing and radiator.Chamber portion can be arranged on the central authorities of light fixture or arrange and at one end go up.One or more light sources are arranged on the installation surface of radiator, make surface of light source to back reflector.Alternatively, light fixture can comprise one or more lens, or is positioned on radiator and is extending to back reflector (making light pass through lens after by the back reflector reflection) above light source or from radiator.Light fixture can also comprise and is positioned at light source top and is positioned at the lamp flame shielding part on radiator.In certain embodiments, light source can have the part of stretching out through lamp flame shielding part to increase efficiency.
An embodiment of light fixture can be used general installation bracket to be installed on ceiling.Installation bracket for example can be used hook and flanged system and match with lamp casing.In certain embodiments, light fixture can be suspended on the ceiling below.
Comprise longitudinally extension so that light fixture has two chamber portions that installation is surperficial according to an embodiment of light fixture of the present invention, each is installed surface and has himself inner chamber and back reflector part.
With reference to transition material, material for transformation of wave length, fluorophor, luminescent coating and relational language, embodiments of the invention have been described in this article.The use of these terms should not be interpreted as restrictive.The use that it should be understood that term fluorophor or luminescent coating is intended to contain and can be applied to equally all wavelengths transition material.
It should be understood that it can be located immediately on another element when an element is called as " on another element ", or also can have intermediary element.In addition, relative terms, such as " inside ", " outside ", " top ", " in ... top ", " bottom ", " ... under " and " in ... below " and similar terms can be used in this article describing the relation of an element and another element.It should be understood that these terms are intended to contain other directions of the device the direction of describing in figure.
Although can describe various elements, parts, zone and/or part by first, second grade of order term in this article, these elements, parts, zone and/or part are not limited by these terms should.These terms are only for distinguishing an element, parts, zone or part and another element, parts, zone or part.Therefore, unless expressly stated otherwise,, in the situation that without departing the teaching of the invention, the first element of below discussing, parts, zone or part can be called as the second element, parts, zone or part.
As used herein, term " light source " can be used in reference to and substitute single reflective optical system or the more than one reflective optical system of making single source.For example, this term can be used for describing single blue led, or it can be used for describing red LED and the green LED with contiguous emission as single source.Therefore, term " light source " should not be interpreted as referring to a kind of restriction of discrete component or multicomponent member, unless separately clearly demonstrated.
As be intended to describe the light with feature mean wavelength with reference to the term " color " that light was used herein; It not is intended to light is limited to single wavelength.Therefore, the light of particular color (for example, green, red, blue, yellow etc.) comprises the wavelength of the certain limit around specific mean wavelength.
In this article with reference to as the cross-sectional view of schematic diagram, having described embodiments of the invention.Like this, the actual (real) thickness of element can be different, and, due to manufacturing technology and/or tolerance, estimates that illustrated shape can be different.Therefore, the element shown in figure is schematically in essence, and its shape not is intended to illustrate the accurate shape in the zone of device, and not is intended to limit the scope of the invention.
The face upwarding stereogram that Figure 1A-1E is troffer according to an embodiment of the invention or light fixture (being used interchangeably in this article), decomposition top perspective view, upward view, side view and end-view.Troffer 100 can coordinate and is arranged in ceiling, is installed on ceiling or hangs up.Figure 1A view of troffer 100 is from a zone of troffer below, that is, and and will be by the zone that is contained in the light illuminating in troffer.Troffer 100 can have all size.For example, 20 " long troffer can have 5.75 " width and 2.0 " height and the weight that is less than 2 pounds, and to send colour temperature when working under 120-227V/60Hz and 40W be the light that 2700K and CRI are 80.40 " troffer can have these identical specifications, but has the weight that is approximately 3 pounds.Troffer (such as two feet long and four feet long troffers) with other sizes is also feasible.Troffer with these and similar size is elongated and has elongated housing.These specifications are exemplary fully, because be feasible according to many different change of light fixture of the present invention.
Housing 102 is configured as and limits the surface, inside that comprises back reflector 104, and however, back reflector 104 separates with the surface, inside of housing 102 in other embodiments.Radiator 106 adjacent back reflectors 104 and installing.Radiator comprises the installation surface that faces back reflector 104.Surface is installed a zone is provided, in this zone, the light source (not shown) can be mounted to towards back reflector 104.In one embodiment, it is flat that surface is installed, and surface of light source is to the middle section of back reflector, and however, angled installation surface is feasible, and is feasible towards the light source of other parts of back reflector.In certain embodiments, light source can be installed on base, and for example, such as metal core board, FR4 plate, PCB or bonding jumper (, aluminium), this base can be used again that for example hot slurry, adhesive and/or screw are installed on independent radiator.In other embodiments, do not use independent lamp bar or base.Some embodiment comprise independent radiator or have the integrated heatsink of fin, and some embodiment do not have fin.
With reference to Figure 1A, Figure 1B and Fig. 1 E, back reflector 104 can be designed to have multiple different formation, to carry out specific optical function, includes but not limited to blend of colors and beam-shaping.Back reflector 104 should have high reflectance in the wave-length coverage of light source.In some embodiments, back reflector 104 can reflect 93% or higher.In other embodiments, back reflector 104 can reflect at least 95%, reflection at least 97% or reflection at least 99%.
Can comprise multiple different material according to reflector of the present invention.In an embodiment of the invention, back reflector 104 comprises diffuse reflection surface.In other embodiments of the present invention, reflector can comprise polymer or the thin-film material that is designed to the light that the reflector of reflection from striation send.In some embodiments, reflector surface can be white.In some embodiments, reflector comprises white plastic (such as the white plastic sheet) or one or more layers micropore PETG (MCPET), and in some embodiments, reflector comprises blank sheet of paper.In some embodiments, reflector can comprise white film, such as the obtainable White97 of WhiteOptics company from the new plug of Germany
TMFilm.In other embodiments, reflector can comprise metal, includes but not limited to the obtainable WhiteOptics from WhiteOptics company
TMMetal etc.In some embodiments, reflector can be coated or spray plastics or the metal device with reflecting material, or coated other matrix materials with reflecting material.Material also can comprise the combination of specular reflector, Lambertian reflector and diffuse reflector, specular reflector and the Lambertian reflector of the angle of the light that can contribute to direct control break direction.
The diffuse reflection light fixture has the capability that the light from the different spectrum of having of solid light source (that is, different colours) is mixed.These diffuse reflectors especially are very suitable for the multi-source design, and wherein two or more different spectral mixings are to produce the output color dot (color point) of expectation.For example, the LED of emission blue light can be used in the combination of the LED with emission yellow (or blue shift yellow (blue-shifted yellow)) light, to produce white light output, or can use the LED of emission blue light and two kinds of light of blue shift light and produce white light output.Diffuse reflector can be eliminated the needs for additional space blend of colors scheme, and this scheme can be introduced losser in system, however, in some embodiments, may be desirably in the combination with other diffuse components and use diffuse reflector.In some embodiments, back reflector 104 is coated with diffuse material.In some embodiments, back reflector 104 can be coated with fluorescent material, and this fluorescent material will transform from least some light wavelengths of light source, to realize the light output of desired color point.
In some embodiments, back reflector 104 comprises diffusion white reflecting material.By utilizing this or similar material positioned light source with towards by reflector emission the first, a plurality of design objects have been realized.For example, back reflector 104 is carried out the blend of colors function, makes to mix distance and effectively doubles and significantly increased the surface area in source.In addition, surface brightness is improved to much bigger comfortable diffuse reflection from bright uncomfortable spot light.The diffusion white material also provides the brightness all had outward appearance when output.Do not need too many enthusiasm (and lower light loss diffusing globe) just can manage the great trial of common needs and large-scale diffusing globe and do improved sharp-pointed (harsh) surface brightness gradient (maximum/minimum than being 10:1 or larger) in tradition direct-view light, take and realize that maximum/minimum ratio is as 5:1,3:1 or 2:1 even.
In various functions, back reflector also can be by veining, to improve blend of colors and to reduce the image from light source.In some embodiments, back reflector 104 comprises micro-hybrid optical device.In some embodiments, by inside or the outside roughening that makes reflector, can give reflector 104 this texture.In the situation that impression can be used Merlon.And, in the situation that impression, the intensity of roughening can spatially change with respect to the center of reflector and/or the position of light source.Roughening can multiple different mode realize, no matter reflector is initially made by extruding or makes by certain additive method.U.S. Patent application No.13/345 in being entitled as of the people such as Lu " light fixture that Light Fixture with Textured Reflector(has the veining reflector) ", the reflector of veining has been described in 215, and the U.S. Patent application No.13/442 submitted on April 9th, 2012, micro-optical device and optics texture have been described in 311, these two patent applications and the application transfer the applicant jointly, and these two patent applications are whole incorporated herein by reference.Such texture for example can also be used on optical element, such as lens.
Reflector 104 can provide blend of colors and reduce color hot spot and reflection when veining in the light fixture that uses a plurality of color reflectors.As an example, some light fixtures comprise that the blue shift Huang adds red (BSY+R) LED system, and wherein, LED light source comprises at least two group LED, wherein one group of emission has the light from 435nm to 490nm dominant wavelength, and the light of dominant wavelength from 600nm to 640nm that another group emission has.In this case, one group can be packed with fluorophor, and when exciting, this fluorophor emission has the light from 540nm to 585nm dominant wavelength.In some embodiments, first group of emission has the light from 440nm to 480nm dominant wavelength, and second group of emission has the light from 605nm to 630nm dominant wavelength, and the troffer emission has the light from 560nm to 580nm dominant wavelength.
Only conduct is according to an example of the veining reflector of embodiment of the present invention, the slim high reflectance PC plate of extruding can have the pattern impressed as the part of expressing technique, and these plates can be pressed against extruding on PC back reflector substrate of not veining.An example of imprinted pattern is prism pattern, and this prism pattern can comprise the prism element of the repetition of extending in all directions.This pattern also can be used in prism material.Another example of imprinted pattern is cutting capstone pattern (cut keystone pattern).Replacedly, can extrude whole reflector, wherein on the inboard of reflector or bottom surface, there is imprinted pattern.The impression of any type can be realized by the veining cylinder of the part as expressing technique.Also can carry out the using rough pattern by making reflector or plate roughening, on the reflector substrate that is pressed into blasting treatment, sand or another kind of coarsenization technique.At the people's such as Lu U.S. Patent application No.13/345, describe the reflector of veining in 215 in detail.
As shown in the best in Figure 1B and Fig. 1 E, back reflector 104 has basically become parabolical cross section on sidepiece, and a flat connects this two parts; But multiple other shapes are also feasible.And shown in Figure 1B and Fig. 1 E, troffer 100 can be designed to have the height profile reduced, " or the less total height such as having about 2.The shape of back reflector 104 should be selected to be and produces suitable reflectance profile, for target, exports.
Typical solid state lamp is in connection with there being radiator, and this radiator is positioned on ceiling, with the LED heat diffusion by conduction in environment.In on-inflatable supercharging ceiling (non-plenum ceiling), the temperature on office and industrial ceiling generally reaches 35 ℃.As discussed herein, the bottom that comprises the radiator 106 of fin structure (if any) can be exposed to the air in room under troffer.
The radiator 106 exposed can be advantageously for several reasons.For example, the air themperature in general office is much colder than the air on ceiling, and obviously this is because room environment must be comfortable for the occupant; Yet, in the space on ceiling, colder air themperature is not too important.In addition, space air normally circulates, or moves through room or circulated by air conditioning by the occupant.Air contributes to break boundary layer through the movement in room, helps to carry out heat diffusion from radiator.And the heat radiator structure of room one side has been avoided the inappropriate installation of insulator on the radiator top, because be arranged on the common solid luminescence occasion of ceiling one side for radiator, this is possible.Thisly prevent that the protection of inappropriate installation from can eliminate potential fire.
Fig. 2 is the amplification plan view that is connected in the installation bracket 212 of light fixture 200.Light fixture 200 comprises housing 202 and chamber portion 208, and chamber portion 208 has centre bore 204, and this centre bore can be used to supply distribution or is connected to installation bracket 212.Installation bracket 212 comprises hook-like part part 216, and described hook-like part partly can be locked in the flange on chamber portion 208 bottom sides, or replacedly, is locked in other parts of housing 202.Various holes in installation bracket 212 and groove 212a can be used to distribution is fed to chamber portion 208, to internal drive circuits, reflector and other electric components, to provide electric power.Installation bracket 212 is general installation brackets, and can assemble the J-shaped case of various difformity sizes, includes but not limited to circular and octagon and 2 " and 4 ".
Fig. 3 A is the sectional block diagram according to light fixture 300 of the present invention, and cutting plane is positioned at chamber portion 308.Fig. 3 B is the view of section view end along same cutting plane of light fixture 300.Analysing and observe view exposes by the inner space 320 of chamber portion 308 formation of housing 302.Radiator 306 is through in space, and optical transmitting set (such as LED) 324 is arranged on luminous band 322, and luminous band self is arranged on the installed surface of radiator 306.In other embodiments, transmitter 324 is directly installed on radiator 306.
Electric component also can be arranged in inner space 320, and such as being connected to circuit installing plate 330, this circuit installing plate is arranged in space 320.Some examples that can comprise electric component in embodiments of the present invention comprise power circuit and drive circuit (only give some instances, comprise for example AC/DC drive circuit and DC/AC drive circuit).In the level to basic, drive circuit can comprise AC to DC converter, DC to DC converter, or the two.In one embodiment, drive circuit comprises AC to DC converter and DC to DC converter, and the two all is positioned at inner space 320.In another embodiment, AC to DC converter is positioned at (that is, being positioned at the optical cell outside) at a distance, and DC to DC converter is positioned at the control circuit place of optical cell inside.In another embodiment, only AC to DC converter is positioned at the control circuit place of inner space 320.
In the embodiment shown, installation bracket 312 utilizes hook-like part and flanged structure to be connected to chamber portion 308.Seen in Fig. 3 A and Fig. 3 B, carriage 312 comprises carriage hook-like part 326, and chamber portion 308 comprises flange 328.In the embodiment shown, radiator 306 utilizes flange and groove structure with flange 332 and groove 334 to be mounted to chamber portion 308.In some embodiments according to light fixture of the present invention, flange 332 and groove 334 are along the whole length setting of chamber portion 308.Between carriage 312 and chamber portion 308 and multiple other connected systems between radiator 306 and chamber portion 308 and/or housing 302 be also feasible, such as screw and/or bonding agent.Some in these replacement connected systems may be more lasting than hook-like part and flanged structure.
Much industry, business and civil applications occasion are called white light source.Troffer can comprise the one or more transmitters that produce same color light or different colours light.In one embodiment, produce white light with the polychrome source.Several colourama combinations will produce white light.For example, as known in the art, will be combined to produce white light with yellow (blue shift Huang or the BSY) light of wavelength conversion from the light of blue led, relevant colour temperature (CCT) (generally designates as " cold white ") in the scope of 5000K to 7000K.By with optically in response to the fluorophor of blue light around transmitter, blue light and BSY light can be produced by blue emitter.When exciting, fluorophor emission gold-tinted, then gold-tinted can be combined to produce with blue light white light.In this scheme, owing in narrower spectral region, launching blue light, so be called saturated light.In much bigger spectral region, emission BSY light, therefore be called as unsaturated light.
Another example that produces white light with the polychrome source is by the light combination from green LED and red LED.The RGB scheme can also be used to produce versicolor light.In some applications, be added with amber transmitter, combine for RGBA.The combination of front is exemplary; Be appreciated that various color combination can be with in embodiments of the present invention.Several in the people's such as Van de Ven U.S. Patent No. 7,213,940, these possible color combination being discussed, this patent and the application jointly transfer the possession of and are whole incorporated herein by reference.
Those, can also use in an embodiment of the present invention many dissimilar transmitters except the above.In certain embodiments, transmitter is soild state transmitter, such as LED or LED packaging part.Can use many different LED, such as the LED chip of commercially available its DA, EZ from kerry Corp. (Cree Inc.), GaN, MB, RT, TR, UT and XT series.In addition, can use in an embodiment of the present invention many dissimilar LED packaging parts.Chip and the packaging part of some types have substantially been described in following file: the U.S. Patent Application Serial No.12/463 of being entitled as of the people such as Donofrio " Semiconductor Light Emitting Diodes Having Reflective Structures and Methods of Fabricating Same(has semiconductor light-emitting-diode and the manufacture method thereof of catoptric arrangement) ", 709, the U.S. Patent Application Serial No.13/649 of being entitled as of the people such as Lowes " LED Package with Encapsulant Having Planar Surfaces(has the LED packaging part with the seal of flat surfaces) ", 052, and the U.S. Patent Application Serial No.13/649 of being entitled as of the people such as Lowes " LED Package with Multiple Element Light Source and Encapsulant Having Planar Surfaces(there is the multicomponent light source and with the LED packaging part of the seal of flat surfaces) ", 067, these three patent applications all jointly transfer the applicant and all these three equal integral body of patent application all are incorporated into the application for your guidance by reference.Transmitter can be launched the light of many different colours, preferably has the transmitter (or the chip of emission blue light, part is converted into gold-tinted to form the white light combination) of transmitting white.Can be used according to a preferred embodiment of the packaging part in light fixture of the present invention to comprise being box-like seal substantially, it causes the packaging part emission broader than Lambertian.At people's Application No. No.13/649 such as Lowes, shown in 067 and described many these packaging parts, this patent application transfers the applicant and integral body all is incorporated into the application by reference.It should be understood that in certain embodiments, the removal subsequently of its growth substrate (growth substrate, growth substrates) can be provided LED.In other embodiments, it is upper that the growth substrate of LED can be retained in LED, and wherein some in these embodiment have growth substrate shaping or veining.In certain embodiments, when the growth substrate of LED is retained on LED, LED is arranged on light belt or installs on surface with flip-chip.
In certain embodiments, LED can comprise transparent growth substrate, such as carborundum, sapphire, GaN, GaP etc.LED chip also can comprise three-dimensional structure, and in certain embodiments, LED can have following structure, and it comprises the facet (facet) of inclination in whole or in part on one or more surfaces of chip.
In one embodiment, at least some transmitters are LED chip and/or packaging part, described LED chip and/or packaging part have the emission pattern broader than Lambertian in certain embodiments, for example, series number is No.13/649,052 and No.13/649, those that describe in 067 U.S. Patent application.In another preferred embodiment, these LED chips and/or packaging part are combined with standard Lambertian transmitter.In another embodiment, transmitter is the LED that phosphorus applies, transmitter described in all being entitled as of the people such as Chitnis " Wafer Level Phosphor Coating Method and Devices Fabricated Utilizing Method(wafer scale phosphorus painting method and the device that utilizes described method to manufacture) ", these two patent applications all divide jointly tasks the application and this two equal integral body of patent application all are incorporated to the application for your guidance.In one embodiment, there are these aspects and for thering is the coating LED chip of the emission pattern phosphorus broader than Lambertian.In another preferred embodiment, these LED, with blue color spectrum emission and capped with yellow phosphorus, form white light emission.In another embodiment, emission lamp has Lambertian emission profile.
Fig. 4 A is the three-dimensional cutaway view of the light fixture 400 that looks over from the bottom side angle, and cutting plane is along the part that is positioned at chamber portion 408 outsides of housing 402.Light fixture 400 also comprises chamber portion wall 409, and described chamber portion wall crosses and Fig. 3 A and the similar inner space (not shown) shown in 3B.In the embodiment shown, use and with the similar flange shown in 3B and slit system, radiator 406 is connected to chamber portion 408 to Fig. 3 A.
Light fixture 400 also comprises lens 440.Lens 440 can comprise that diffusive material is to help blend of colors.Lens also can be used for protecting the consumer from high voltage devices (such as LED) and contact.In the embodiment shown, lens 440 have semi-circular cross-section and be mounted to radiator 406 above the transmitter (not shown).Although lens 440 are shown as, be arranged on radiator 406, many other layouts are also feasible.For example, can use slit 434 that lens board (following describe in more detail with reference to Fig. 6) is arranged between housing 402 and radiator 406, make slit 434 be connected to chamber portion 408 and be connected to the lens in chamber portion 408 perimeters.As describe in further detail, that lens can be veining and/or comprise for example microlens structure.At the people's such as Lu U.S. Patent application No.13/442, describe the lens with texture structure and the lens with microlens structure in 311 in detail.
Fig. 4 B is the three-dimensional cutaway view of the light fixture 401 that looks over from the bottom side angle.Light fixture 401 comprises many parts identical with light fixture 400, and corresponding Reference numeral is for meaning corresponding element.Replace lens 440, light fixture 401 comprises flare carrier 441, needs this flare carrier to cover the high pressure transmitter.The flare carrier can be made by for example glass or UL945VA grade (rated) transparent plastic.In certain embodiments, the flare carrier comprises otch, and the part of transmitter (such as the LED dome) can stretch out by described otch, and the flare carrier still covers the high-pressure section of LED to meet the engineering design requirement simultaneously.Described embodiment can contribute to make the minimum optical losses relevant to the flare carrier or even eliminate described light loss.Some embodiment can comprise lens 440 and flare carrier 441 both, and in certain embodiments, discrete component can combine both features and/or carry out two kinds of functions.
As previously described, can be mounted to ceiling according to light fixture of the present invention.Figure 5 illustrates such embodiment.Can use the installation bracket (not shown) that light fixture 500 is mounted to ceiling.According to light fixture of the present invention, also can be mounted in the cavity in ceiling by the whole bag of tricks (comprise and use installation bracket).According to light fixture of the present invention, also can hang from ceiling, light fixture 600 as shown in Figure 6.Light fixture 600 comprises two suspension arrangements 642, and however, any amount of suspension arrangement is all feasible.At distribution, be not connected directly in the embodiment (that is, from distribution wherein, by hole 114, entering the embodiment that troffer 100 embodiment of chamber portion 408 are different) of chamber portion 408, distribution can with so directly mode be connected to the cavity part.For example, by making distribution, extend through one or more suspension arrangements, extend through housing 602 and extend to chamber portion 608, make distribution can be connected to troffer 600 and chamber portion 608.Replacedly, suspension arrangement can be connected directly to chamber portion 608, and no matter chamber portion 608 is positioned in the central authorities or an end of light fixture 600.In other embodiments, for example, can use simple chain or rope suspended lamp.
Alternatively, light fixture 600 can comprise the lens board (not shown).Lens board can be arranged between housing 602, radiator 606 and/or chamber portion 608.Lens board can with one or more cooperation the in housing 602, radiator 606 and/or chamber portion 608.For example can use the radiator slit (not shown) similar to the slit 434 shown in Fig. 4 that lens board is mounted to radiator 606.In one embodiment, lens board also is mounted to chamber portion 608 and/or one of them end cap 610, and however, this is always not necessary.
Can comprise many dissimilar lens boards according to troffer of the present invention.Lens board can be used for providing physical protection to the parts in troffer (such as LED).Lens board can be realized above-mentioned purpose by for example stoping physical damage or dirt accumulation (it can adversely affect emission effciency, intensity and/or the profile of troffer).The uniformity that lens board is also launched for improvement of troffer.The type that depends on reflector used in transmitter and troffer is being seen bright " focus " sometimes on reflector above emission source.These focuses be sometimes do not expect to occur and can adversely affect emission uniformity.Lens board can be by being dispersed in wider viewing area and contributing to reduce the appearance of these focuses for the observer from the light of these focus reflections.In some cases, from the light of these focus reflections, may be interspersed within whole lighting apparatus.Even, in not forming focus or emerging not the troffer of remarkable focus, lens board also contributes to diffusing light, widens the emission profile of troffer, focuses on the emission profile of troffer, and/or produces more uniform outward appearance.
Lens board can be by veining to realize one or more above purposes.For example, lens board can comprise facet, maybe can comprise one or more films, and described film has linear or discrete facet or other texture structures.Other examples of lens board have dazzles (deglaring) prism.According to the present invention, an embodiment of the lens board used in troffer comprises extruding acrylic acid, has the diffuser film coating or one of is formed in the diffuser in acrylic acid.Other embodiment of available lens board in the present invention comprise diverging lens, and described diverging lens is for spreading all incident lights.Other embodiment can comprise acrylic acid, PMMA and/or diffusion additive.Some embodiment can comprise clear acrylic.The lens board of type described in literary composition is only some in the lens type that can use, and is not intended to be limited to this.At the people's such as Lu U.S. Patent application No.13/442, the lens type can be used on according in light fixture of the present invention has been described in 311.
Fig. 7 A-7E is bottom perspective view, top perspective view, bottom diagram, sidepiece figure and the end view of another light fixture 700 according to the present invention.Light fixture 700 comprises housing 702, back reflector 704, radiator 706 and two end caps 710.Light fixture 700 also comprises chamber portion 708, as described as radiator 106 and the chamber portion 108 of reference Fig. 1, and in one embodiment, radiator 706 by chamber portion 708 and continuously.Different from the chamber portion 108 of Fig. 1, chamber portion 708 is in the central authorities of light fixture 700, but at a longitudinal end place of light fixture 700.In the embodiment shown, chamber portion 708 is against end cap 710, and however, some embodiment do not comprise end cap 710.Various holes on the back side of chamber portion 708 and slit 708a are for being supplied to distribution chamber portion 708 to power to internal drive circuits, transmitter and other electric components.Centre bore 714 can be used for supplying with distribution, or can be used for light fixture 700 is connected to the installation bracket similar to the installation bracket 212 shown in Fig. 2.In addition, although chamber portion 708 is positioned on the end of light fixture 700, chamber portion can be positioned at any position along light fixture in other embodiments.In addition, although light fixture 700 comprises single chamber portion 708, other embodiment can comprise two or more chamber portions, such as each the longitudinal end place at light fixture, have a chamber portion.
The embodiment similar to light fixture 700 also can comprise one or more lens.For example, as shown in Fig. 7 C, lens can occupy two zones 707 that limited by housing 702, radiator 706 and chamber portion 708.In another embodiment, lens are positioned on radiator and are positioned at any transmitter top mounted thereto.In another embodiment, only need lens.Described lens can be by also occupy this two zones 707 in order to cross light fixture simultaneously below radiator 706.In similar embodiment, radiator 706 is positioned on lens.
Similar to the chamber portion 308 shown in Fig. 3, chamber portion 708 is provided for arranging the inner space that power supply is connected with drive circuit and distribution.This space protection connects the vibrations that avoid being subject to the outer member impact and contribute to prevent user in installation process.Similar to the chamber portion 308 shown in the chamber portion 108 shown in Fig. 1 and Fig. 3, chamber portion 708 can be designed to coordinate with installation bracket (installation bracket 112 as shown in Figure 1).Described installation bracket can directly be mounted to J-shaped box or ceiling.After carriage is mounted to ceiling, can use hook-like part and flanged structure to snap in place by chamber portion 708.In the embodiment shown, can use screw, hook, line, rope, perhaps many other attachment means are attached to ceiling by the end cap relative with chamber portion 710b.In Fig. 8, show the troffer similar to troffer 700 800 that is mounted to ceiling.In other embodiments, whole light fixture 700 can dangle from ceiling by line or rope.
Fig. 9 A to Fig. 9 G is face upwarding stereogram, top perspective view, upward view, top view, side view, end-view and the decomposition view according to another light fixture 900 of the present invention.Light fixture 900 comprises housing 902, back reflector 904, radiator 906 and two end caps 910.Light fixture 900 also comprises chamber portion 908.As shown in FIG., radiator 906 is continuous through chamber portion 908.Different from the chamber portion 708 in Fig. 7, the central authorities of chamber portion 908 in light fixture 900.
Also can comprise lens with the similar embodiment of light fixture 900.By chamber portion 908 being placed on to the central authorities of light fixture 900, four lens can occupy four zones 907 that limited by housing 902, radiator 906 and chamber portion 908, as shown in Figure 9 C.With larger lens, compare, less lens can be manufactured more cost-effectively.Therefore, the situation that occupies the larger lens in two zones 707 with employing in Fig. 7 C is compared, adopt occupy four zones 907 can be more cost-effective than lenslet.
Fig. 9 G is the exploded perspective view of overlooking of light fixture 900.As directed, chamber portion 908 comprises main casing 952, shell on the back body 954 and is contained in the electric component 956 in chamber portion 908.For example, described electric component can comprise the circuit on PCB.The parts of light fixture 900 can utilize multiple attachment arrangement to be attached to each other.As shown in Fig. 9 G, an embodiment adopts screw 958 as attachment arrangement.End cap 910(is if present) also can utilize the attachment arrangement such as screw 958 to be attached to main casing 902.
According to the present invention, less light fixture is also possible.Figure 10 is the face upwarding stereogram according to light fixture of the present invention.That light fixture 1000 can have is about 10 " length, about 17 " width and about 2.5 " or following or about 2.0 " or following height, but these sizes are only exemplary.Light fixture 1000 comprises housing 1002, one or more back reflector 904, one or more radiator 1006 and one or more end cap 1010.Contrary with the chamber portion 108 in Fig. 1 (this chamber portion extends to end cap 110 perpendicular to the length of light fixture 100 and radiator 106 from end cap 110), chamber portion 1008 can be from end cap to end cap longitudinally and be parallel to radiator 1006 and extend.Chamber portion 1008 can coordinate with radiator 1006 or be positioned on described radiator, and in some embodiments, the heat that the parts that radiator 1006 dissipates in chamber portion 1008 produce.
Figure 11 A is the sectional block diagram of light fixture 1100, and wherein cutting plane is transverse to chamber portion 1108.Chamber portion 1108 holds electric component 1108a.Light fixture 1100 has two inner surfaces, is back reflector 1104 in the case.As directed, light fixture 1100 comprises having two radiators 1106 that surperficial 1106a and 1106b are installed.In some embodiments, radiator and one or more installations surface are all integral with one another.Some other embodiment can comprise two or more radiators, and each radiator all has one or more installations surface of the integral type of himself.
Light fixture 1100 also comprises chamber portion 1108.This chamber portion is along the top length of radiator 1106.In the embodiment shown, radiator 1106 can be provided for the path of the heat dissipation of transmitter from surperficial 1106a and 1106b are installed and chamber portion 1108.
Optical transmitting set 1124 is arranged on to be installed on surperficial 1106a and 1106b.These optical transmitting sets 1124 are towards two back reflector 1104 utilizing emitted lights.The shape of back reflector 1104 is designed to make the light fixture halo exterior feature that produces expectation.In the embodiment shown, transmitter 1124 have vertical surface to main emitting surface.Therefore, the shape of back reflector 1124 is designed to make light to turn to away from chamber portion 1108 and towards lens board 1140, and light will be through described lens board.In other embodiments, surperficial 1106a and 1106b are installed can be angled, and the shape of back reflector 1104 can correspondingly be adjusted.Although shown embodiment comprises two back reflectors 1104, other embodiments can comprise the single back reflector with two inner surfaces.For example, back reflector can be crossed chamber portion 1108 and therefore on the either side of chamber portion 1108, form inner surface.
Light fixture 1100 also comprises one or more lens boards 1140.Lens board can be used for providing physical protection to the parts in troffer (such as LED).Lens board for example can be realized this point by preventing physical damage or dust accumulation, and this can have negative effect to emission effciency, intensity and/or the curve of troffer.Lens board is also as the uniformity of improving the troffer emission.Depend on transmitter used in the type of transmitter and troffer, see sometimes bright " focus " light on the reflector above emitter source.These focuses be sometimes do not expect and can negative effect be arranged to uniformity occurs.Lens board can help reduce the situation that the beholder sees these focuses by expanding to wider viewing area from the light of these focus reflections.In some cases, can expand whole light source from the light of these focus reflections.Even in not having focus to emerge or forming not the troffer of remarkable focus, lens board also can contribute to diffused light, the launching curve of expansion troffer and/or produce more uniform outward appearance.
In one embodiment, lens board 1140 comprises the diffusion part.Diffusion effusion lens work in several mode.For example, described diffusion effusion lens can prevent the direct visuality of light source, and provide outer luminous extra mixing to realize the visually uniform source of light of pleasant.Yet the diverging lens plate can be incorporated into extra optical loss in system.Therefore, at light, by back reflector or by the well-mixed embodiment of other elements, diffusion effusion lens may be optional.In this embodiment, transparent glass lens plate can be used, or described lens board can be wholely removed.In other embodiments, can in lens board 1140, comprise scattering particles.Some embodiment can comprise specular back reflector or partial mirror back reflector.What may expect in this embodiment, is to use the diverging lens plate.
Can utilize several different structures to realize the diffused component in lens board 1140.Diffusion barrier lining (inlay) can be applied to top surface or the bottom side surface of lens board 1140.Also likely manufacture the lens board 1140 comprise whole diffusion layer, such as by jointly extruding bi-material or by diffuser is molded on outside or inner surface in insert molding (insert molding) mode.Transparent lens can comprise the geometrical pattern that is rolled into during fabrication in extrusion pin or is molded into the diffusible or repetition in described surface.In another embodiment, self can comprise the bulk diffusion body lens board material, such as the colouring agent added or have the particle of different refraction coefficients.
Be with facet according to an embodiment of lens board of the present invention.The facet lens can use protuberance or tip, so that scattered light in a predefined manner.The facet lens can comprise prism, such as removing to dazzle prism and/or linear prism.Lens board also can comprise the film with linear or discrete facet.If by a plurality of film-stack, the characteristic of this film can strengthen.This film can be on the groove bracket side of lens board, on the emitting side of lens board or be positioned on these both sides.In some embodiments, lens can be used for for example utilizing the microlens structure outer luminous bundle that is shaped optically.At U.S. Patent Application Serial Number No.13/442, describe microlens structure in detail in 311.
Figure 12 is the sectional block diagram of light fixture 1200, and wherein cutting plane is longitudinally along chamber portion 1208.As directed, in this embodiment, the whole length that chamber portion 1208 can extending flute support 1200.In other embodiments, the whole length of described chamber portion extending flute support.Shown in enforcement side in, housing 1202 comprises the part 1202a that is positioned at reflector 1204 tops.In other embodiments, reflector 1204 can be used as the back of the body surface of groove support 1200.
Figure 13 be to shown in the stereogram of the groove support 1100 that the is mounted to ceiling groove support 1300 similar with 1200.In other embodiments, whole light fixture 1300 can hang from ceiling, such as utilizing line or rope.
In an embodiment of the invention, a plurality of light fixtures (for example, one or more in light fixture 100, light fixture 700 and/or light fixture 900) can be linked together to form longer light fixture, this longer light fixture for example is used in corridor the illumination that provides continuous.In one embodiment, the end cap (if present) of the light fixture end be connected is removed, and connects two light fixtures with two attachment arrangements.The example of attachment arrangement includes, but not limited to the connector plate, is combined with end cap and the bilateral end cap of attachment means.In another embodiment, light fixture can have the attachment arrangement of integral type.For example, light fixture has male attachment arrangement and have female attachment arrangement on the other end on can be at one end.Above-mentioned attachment arrangement and method are only exemplary, for multiple different devices and the mode that connects a plurality of light fixtures, are possible.
Figure 14 shows two light fixtures 1400,1410 similar to the light fixture 900 in Fig. 9 in many aspects, and shows the connector structure that comprises sleeve 1420 and installing plate 1430.Each in light fixture 1400,1410 all has an end cap to remove.Installing plate 1430 for example utilizes screw to be attached to light fixture 1400,1410, and sleeve 1420 holds to cover joint interface around.The sleeve that profile is designed to mate with the back side of light fixture is also possible, such as being does not have sleeved connector structure.Illustrated in Figure 14 B and comprised two than the elongation light fixture 1450 of small lamp 1400,1410 and comprise sleeve 1420 and the connector structure of installing plate 1430.Can extra light fixture be attached to the end of elongation light fixture 1450 on either direction, the elongation light fixture that there is certain desired length with generation.For the light fixture that uses any type installation system, the elongation light fixture is all possible, the light fixture of any type installation system of described use includes but not limited to, the light fixture that the light fixture that the light fixture that install on the light fixture that ceiling is installed, surface, wall are installed, hanging are installed and the light fixture hung.
It being understood that it is schematic that embodiment that this specification proposes is intended to.Embodiments of the present invention can be included in any combination of any compatible features shown in a plurality of accompanying drawings, and these embodiments should not be limited to the embodiment that those clearly illustrate and illustrate.Although with reference to some preferred disposition of the present invention, describe the present invention in detail, other modification are also possible.Therefore, the spirit and scope of the present invention above-mentioned example that should not meet.
Claims (28)
1. a light fixture comprises:
Housing, described housing is shaped as the restriction inner surface;
Back reflector, described back reflector is positioned on described inner surface;
Radiator, described radiator is crossed over the length of described housing; And
Chamber portion, described chamber portion limits and is shaped as the inner space that holds electric component, and wherein, described chamber portion coordinates with described radiator.
2. light fixture according to claim 1, wherein, described radiator is through described chamber portion.
3. light fixture according to claim 1, further comprise at least one end cap on an end that is positioned at described housing, and described housing and described radiator are bonded to described end cap.
4. light fixture according to claim 1, further comprise lip-deep at least one light source of the installation that is positioned at described radiator, makes the light of described at least one light source emission be incident on described back reflector.
5. light fixture according to claim 4, further comprise the lens that are positioned on described scatterer and are positioned at described at least one light source top.
6. light fixture according to claim 4, further comprise the flare barrier that is positioned on described scatterer and is positioned at described at least one light source top.
7. light fixture according to claim 4, further comprise the flare barrier that is positioned partially at described at least one light source top;
Wherein, the part of described at least one light source is given prominence to through described flare barrier.
8. light fixture according to claim 1, further comprise dismountable general installation bracket, and described general installation bracket is attached to the outside back surface of described chamber portion.
9. light fixture according to claim 1, wherein, described back reflector is veining.
10. light fixture according to claim 1, wherein, described back reflector comprises micro-hybrid optical device.
11. light fixture according to claim 1, wherein, described chamber portion is arranged on the middle section of described housing.
12. light fixture according to claim 1, wherein, described housing comprises at least a portion of the inner surface on the either side that is positioned at described chamber.
13. light fixture according to claim 1, wherein, described chamber portion is arranged on an end place of described housing.
14. light fixture according to claim 1, wherein, described housing is that elongated and described chamber portion is transverse to described elongated housing.
15. light fixture according to claim 1, further comprise the first end cap and the second end cap, wherein, described chamber portion longitudinally extends towards described the second end cap from described the first end cap.
16. light fixture according to claim 1, further comprise the first end cap and the second end cap;
Wherein, described chamber portion longitudinally extends between described the first end cap and described the second end cap.
17. light fixture according to claim 1, further comprise a plurality of lens boards that extend towards described back reflector away from the both sides of described radiator.
18. light fixture according to claim 1, wherein, described elongated housing comprises extruding plastic.
19. light fixture according to claim 1, wherein, described light fixture is constructed to be installed to ceiling.
20. light fixture according to claim 1, wherein, described light fixture is installed into and makes described light fixture be recessed in ceiling.
21. light fixture according to claim 1, wherein, described light fixture hangs from ceiling by one or more suspension arrangements.
22. light fixture according to claim 1, wherein, described inner space holds electric component; And
Wherein, described electric component comprises AC to DC converter.
23. light fixture according to claim 1, wherein, described inner space holds electric component; And
Wherein, described electric component comprises AC to DC converter and DC to AC converter.
24. a light fixture comprises:
Housing, described housing is shaped as and limits two or more inner surfaces;
Back reflector, described back reflector is positioned on each described inner surface;
Radiator, the close described back reflector of described radiator and the length of crossing over described housing; And
Chamber portion, described chamber portion limits and is shaped as the inner space that holds electric component, and wherein, described chamber portion coordinates with described radiator.
25. light fixture according to claim 24, further comprise the first end cap and the second end cap;
Wherein, described chamber portion extends towards described the second end cap from described the first end cap.
26. light fixture according to claim 25, wherein, described chamber portion extends to described the second end cap from described the first end cap.
27. light fixture according to claim 24, further comprise lip-deep at least one light source of the installation that is arranged on described radiator, makes described at least one light source be intended at least one the back reflector utilizing emitted light in described back reflector.
28. a light fixture comprises:
Housing, described housing has a length and limits an inner space;
Back reflector, described back reflector is arranged in described inner space;
Radiator, described radiator extends to the second end of described housing and is close to described back reflector from the first end of described housing;
A plurality of light sources, described a plurality of light sources are positioned on described radiator and towards described back reflector;
Chamber portion, described chamber portion is between the described first end and described the second end of described housing.
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| US13/834,605 | 2013-03-15 | ||
| US13/834,605 US9188290B2 (en) | 2012-04-10 | 2013-03-15 | Indirect linear fixture |
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| CN103423666A true CN103423666A (en) | 2013-12-04 |
| CN103423666B CN103423666B (en) | 2018-10-30 |
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| US20130286637A1 (en) | 2013-10-31 |
| CN103423666B (en) | 2018-10-30 |
| US9188290B2 (en) | 2015-11-17 |
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